convert date to yyyy-MM-dd format using monet code example

Example 1: javascript convert date to yyyy-mm-dd

// `date` is a `Date` object
const formatYmd = date => date.toISOString().slice(0, 10);

// Example
formatYmd(new Date());      // 2020-05-06

Example 2: sql convert date to string yyyy-mm-dd

select CONVERT(char(10), GetDate(),126)
/* 2020-12-23 */